Comment 21 for bug 1173566

In current 14.04 only step 3 was necessary for a workaround, e.g. according to the bug description:

3. finally I created a file named "usb-storage.conf" in /etc/modprobe.d" and copied in these lines:
# Increase the default delay to avoid conflict with usb_modeswitch

options usb-storage delay_use=3

The new option SetStorageDelay in usb-modeswitch.conf did not work for me.